Contreras, V. (1999). Study finds up biased against poor. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Contreras, Voltaire. "Study Finds Up Biased Against Poor." Philippine Daily Inquirer 1999.
Lua MLA (9ú heag.)Contreras, Voltaire. "Study Finds Up Biased Against Poor." Philippine Daily Inquirer, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.